Clutch mechanism



.May 31, 1927.

G. wnncox CLUTCH acmmxsu l Filed June 12. 1924 `2 sheds-sheet 1 Q A vf" I U I l/'v fzfoz: I, GEORGE ILCOX) Aqrqfommi paese-i ,May a1', 1927:

GnonGE winmx, oF

'livrAcHrNnaY Co., aloonr'oaafrion cncatisoanm.-

CLUTCH Mncria-NitsM'.

appiicatin. mdiane 1.2,

This invention relates to clutch mechanism lemployed for` the ypurpose of transferring motion 'from one rotating member'to any other. It isy anuobjectsof the invent-ionto provide a.k clutch whereby an intermittent-rotary lmotion may be derived from a constantlyV rotating member. v It isa further object of the inventionto provide a clutch which will be vvery sensitive i in operation yand may therefore be readily engaged and .disengaged In.' certain types .of handzoperated machines, the objectfup'von V which the operation is made, -is nianually placed in the machine; In such types of ina- Y chines, ay manually operated .clutch is em# ployed for drawing the machine into action. Injury to workers has occurred due tothe f throwingv in of the Vclutch with one hand `while the otherhand is yet in a position in the path of av moving part of theA machine fandalso injury has resultedfrom the clutch repeating, .or in otherv words, ailingto stop at thefirstv actuation ofjthe machine and continuing throughk repeatedactuations.. l',

The especial advantagesy of the invention and further objects thereof` will be made I'evif Y dent lhereinafter-4f` l .y Referring to .the drawings' whichiare for illustrative purposes only V:v 1 A A i v v Fig.l is a partially sectioned elevation showing an embodiment of. my 1 invention with the parts thereof in power transmitting d relationship. g v. l d v d y Fig. 2'is aA partially sectioned'view showing the 'clutch mechanism disengaged. d

. Fig; 3 is a section taken upon a plane represented bythe line 3.-'43ofFig. 1. l

Fig. '4 isv a'plan view of'the clutchmemyer..-'.

we 1g.. 5 is a fragmentary view showing .the clutc -actuating mechanism. 'Y j g Fig. 6"isV a perspective view' showing the clutch-operating levers.' q I Fig/7 is'arfrajgmentary view showing the clutch plate secured to the driving member, The embodiment of my'inventions'hown in the drawings employs 1 a drivenclutch member 11 arranged to be keyed asshown at `12 upon a`shaft-13 whichis tobe drivenV by a 'rotating member such as the pulley 14, which may Vbe'loosely mounted uponthe shaftand Y prevented fromremovalvby acollar l15p. As ..shown in Figs. land 2 the member 11 lis provided with a longitudinally yslidable 'engagemeut member .,17- having lfan.. .engagement ieee: 'semaine-71195070, A l

which issecured by bolts orscrews.21 vto the pulley'j'l4and thereby becomes part' 'of the 9 j l 60 ,y nienfib'er'lf lisz'tlso,y iliadefromy tool 'steel and i f i` Vproperly tempered and'is giventhe formA of RIVER'Sl-DE; CLFRNASSIGOR To oatrroniira can'1v-rias:f-1v

1 end 18Varrank'ged to project'-intoiopenings i l; A

*formedj'in'ar'tempered' tool vsteel plate '2O i a cylindricalfba'r 23 which is shown asrotatfV -ablejon' .itsow1n'4 longitudinalV axis' and 'or' k pendicularlyextending operating arm ,'24, the outer endQA of which yprojects through 'a caml slot 2 formed 'in the outer cylindrical' wall 29 of a-prlniary casting comprising plate 30y which c oope'ra'tes" with a secondary plate 31V '1 .in'forming'the member1l'.l Thecasting' 30 j 1s provided `with areainedyopening 33 which slidably receives the rearward end 34 of the enga'gementvmember 17 andthe plate Slis provided with a corresponding .and aligned lopening.35 iii-which the forward or engel-'gefr men't'end 18 of thebar'23is slidable The i l' canislot'2T-"consistenciaradial' portion 37* l which liesin'a` vplane perpendicular to the yrotational'axis of the memb'er'llandf a .sloped Lportion 38- disposed atan angle with respectl to the'portion 37, ".When fthe outer end 25Y of the operatingarm'24'rests in the slot 'por-H l tion 3'?,v or `r`at the forward: end. 39 of the B5- sloping portion 138;, .the cylindricalfk bar l 23 is disposed in .suchfpOSton Ithat theengage-xf gage' `one. of thejfopening's. V19l 'othe` drive plat'e; 20.j 'Ar-'spring 40irse`cured at one end between pinsf41' shown "as projecting in' wardly or forwardly from plate and havingthe other end thereof 'engaging' the operating arm' 24 at 42,v contimially ,exertsl 'af the arrow 43, Figi 3,"thus Vtending "to hold ment.' end 18 thereofr will project from! the d .l plate 30. and .is therefore'inposition tofe'n-` 'Y .the arm 24 Vat the rearward` end ofthe-slot, i. or in. other words, in thepositions shown :in l Figs. 17.3 and .4.. The clutchis arrangedfto.1y

be driven inthe direction of thegarrow 44,7

sition on lthe outer cylindrical'facejof 1the wall l29, .Figi 3., rand is 'therefore in the path k Vof Vthe .projecting end A250i the" opera-ting arm 24 so thatlas theclutch'isrotated for# willbe engaged by the-end 49of'thfe., pawl.v

wardlyy in'the'f-direction of the 'arrowff445' it ement, whereas thejbodyr 11 of the clutch-'will` continue to move forwardly due to momentum and also due to engagement of the engag'ement end 18 with the plate .20, thus" produsting a relative movement of theoperating arm 24, which is rearward with respect to thev body 1l asin-dicated by the/arrow 51,7 Fig.` 4; i This rea-rwa'rdmovement vof the arm 24y lcauses it to advance into the'sloped portion 38v of the cam slot 27 in the direction'of the larrow lftlierefore producinga lateralv movement in theengagement member 17 in the direction Aof the arrovi7 52, Fig. 4, and

s moves lin'tdithe position in which it is shown i i'nFig. 2; ythus withdrawing the engagement end 18,'from the opening 19 inthe plate 20.

" The drivenmember 11 now` disengaged from thedriving element formedby the pulothermeans not shown.v

ley 14'and` the plate 20,' permitting theshaft and themechanism associated therewith'to remain .stationary while the pulley continues to. lrotate under driving/action ofa belt or tion of the arrow; Fig. 5, thus lifting the pawl out ofthe path ofthe projecting portion25 of the engagement member 17 where- D CS V 7 upon the actionof the spring 40 immediately `moves the arm 24 in V'a direction opposite to l `the arrow 51, Fig. 4, into the position at the rearward end; 89 of the sloped portion 88 formingpartof the cani slot 27. This proillustrated in Fig. 5.

, lduces a lateral movement 'of the bar 23 ina 40 vdirectionfopposite'tothat indicated yby the arrow 52 withthe result `that lthe engagement end 18 is forciblyfprojected into a passing. opening 1-9 .and driving engagenient'formed between the plate 2O andthe member 11 The invention employs means wherebythe clutch is prevented from repeating, Vor` vin other words, prevented from makingmore than af single revolution. This mechanism is Projecting from the rearward .face 70 of the member 11 is a cam '71 having a' peak 72 which is disposed' 'suby stantiallyin alignment with the engagement .member 17. Letit be considered' that the ybar 60 has been pulled outwardly in the direction of the arrow`65 and lhas been held lin f thisposition either manually ordue to bind ing 'of associated parts so; that the pawl 47 vis h eld in the position shown infull lines in this ligure. 'The cam and the engagement member 25 will rotate in theVdirection of the arrow 75-tlirougli the positionindicated i in kfull lines at 76'to1the position indicated 'b vdotted lines77, whereupon the forward end.78of 'the bar GQ will be engaged by the cam 7 2 and raised into tlieposition shown by the dotted lines 79. whereupon slot willbe lifted from engagement with the pin 61,'allowing the pawl 47 to movey under theV action or' the spring 8 0 into engagementposition as in dicated'by the. dotted lines 81`7 so that the engagement'Y end l25of the member 17 will bel moved in the slot portion 38, as y l previously described, and the clutch member 11 thereby disengagedfrom the driving ele-1 ments.; .Beforethe clutch canV again belactuated, the lmember `GO .inust be moved forwardly into'the positionindicated by dotted ylines 82, so that the slot .62fcan drop downover the pin (S1. It will be readily recog' nized that this mechanism"elfectuallypref soy vents repeating by the clutcheventhough" the operator carelesslyholds bar in ou'tfl ward position. `,l Y

In Fig. 6,' l show mechanism empl'oyed'in .conjunction with Fig, 5, fer preventing operation of the lclutchwhile one of the workers hands isV in aiv iliosition*of danger. rEhis mechanism 'consistsof a shaft 855,y n'iountedin suitable bearing inembersfiv and having a horizontally extending lever-arm-l 87 andan iipwardlv extending lleverarm 88 'to which` the end "89 of the bar 60,previously'sho'wn Y in Fig.' 5, is pivotally secured.` It jwill be y 905 would 'be productive of amoveinent' of recognized ythat downward `movement of4 the lever arm 87, as indicated Vby the arrow thebar 6()y in the' 'direction oftheY arrow'91` For downwardly depressing fthelever'iarm *i 1 y87,1 employ a balance arm V92 havingfde'- pressing means such vas the vertical rodsf Yand Y94 at ther ends thereof, =,which rods may be supported by brackets 955 Depressing'the vvertical .rod 93g without'simultaneously-'def" l tion-.indicated by the line -rct'awhich is pro'- pressingtherod 94 is productive'of merely swinging ofthe Vbalance bar] '92 into :thep'osi-L i'osj l ductive of no downward:'movement inthe y lever arm 87. Howevei; ifthe rod 93 isheld downwardly bythe operators leftfhan'dand the rod y94 then depressed'the' right hand,V

a downward movement of' 'the leverarm87wv will be, producedfand the bar GO'movedinto a direction causing withdrawal ofthe' pawl 47. It will be recognized that withthisjarsrangement,' it is -necessaryfto depressboth ends of the balance larm 92 simultaneously and that this canbe .ac'complished'onlyby` use ofboth hands of the operatorand, there-l ers'hands due to carelessnessf* f I claim as my 1nvention: y n

1. In combination.: a Vdriving member rofore, positively preventsv injuryV to vthework-` Ytat-ably disposed ona shaft; a driven mem-` ber non-rotatably disposed on saidshaft comprising a housing having .a :peripheral slot formed inthe periphery vthereof.; an en' gagement member arranged t-oprovideA driv-f.

ing engagement between said driving` and j driven membersfcomprising'a cylindrical' bar slidably Vand rotatably disposed-withinfsaid ino Y driven member, and an operating arm eX'- tending fromv said cylindrical .bar and Y through said 'slot and to the exterior of 'a control bar for removing saidY pawll from` said driven member; and actuating mechanism comprising an Vactuating pawl for engaging the exterior extension 'oi said operating arm oli' said engagement member, and

said engagementwith. said operating arm of ysaid engagement memberl for allowing said engagement member to move into engagement position.

2. In combination: a Viding a number oi' openings rotatably disposed on a shaft; a driven member keyed to said shaft comprising a housing having a slot formedin the periphery thereof and having a cylindrical opening provided there* in, and a clutch plate having a Cylindrical Opening secured to said housing, said cylindrical openings being in alignment; an engagement member comprising a cylindrical -bar disposed in saidv cylindrical openings and axially slidable therein, and an operating arm extending from said cylindrical bar and through said slot to the exterior of said housing; and actuating mechanism for detei-mining the disposition or said engagement member comprising anactuating pawl for engaging the outer end of said operating arm in a. manner to hold said engagement' memberl in non-engaging disposition, and

a control bar for removing said pawl from engagement with said engagement member so as to allow, said engagement member to move insuch a manner that said cylindrical bar `will enter one of said openings in said drive member and provide driving lengagement therebetween. p 1

3. In a non-repeating clutch, the combinadriviiig member pi'o V'driven member; a cam follower formed' integral with saidcontrol barand arranged to engagepsaid cam in such a manner as to if said 4. In a non-repeating clutch, the combif nation otra drive member, avdiiven member; an engagement member arranged to lprovide driving engage'nient` between .said driving and driven members; an actuating ypawl arranged vto vengage said engagement lcause said control bar'to release said pawl f pawl is retainedin non-engaging position.

member so as tofretain said engagement' member in non-engaging disposition; means iior resilientlyretaining said pawl in said I engagement'vwith said engagen'ient member; 1 acontrol bar having a slotV formed therein arranged to engage a pin on said pawl 'for removing said pawl from engaging saiden# gagement member; a cam' formed on saidl driven member; a cainifollovver formed integral with/said vcontrol bar and arranged to engage said cam in such a manner as to -v cause said slot in said bar to release saidf4 "5 pin allowing said pawl to ret-urn to' said yen-V gaging position, if said pawl is held in non? engaging position by said 'bai'. Y

In testimony whereof, I have hereunto my hand at Riverside, California, this .ith day of June, 1924. Y

Y. f r GEORGE VVIIJCOX.

set 

